Dyfyniad APA

(2009). PYP L10 The Earth's Resources single (Pearson Baccalaureate PrimaryYears Programme). Heinemann.

Dyfyniad Arddull Chicago

PYP L10 The Earth's Resources Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

Dyfyniad MLA

PYP L10 The Earth's Resources Single (Pearson Baccalaureate PrimaryYears Programme). Heinemann, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.